"Rush mode" refers to a state of working or doing something quickly and urgently without wasting time or lingering to complete tasks rapidly. Full definition
On top of that, every game has a time attack and boss rush mode for gamers who want to show off their skills. (videochums.com)
Start in rush mode and you will end more or less there as well. (careerladder.sg)
The single player featured a lengthy campaign whereas the multiplayer brought the well balanced Rush mode where teams fought to destroy or protect gold. (gamerheadquarters.com)